Refining engine for use in pulp refining



Sept. 26, 1933. w G, FRASER 1,928,052

REFINING ENGINE FOR USE IN PULP REFINING Filed March 5, 1931 2 Sheets-Sheet 1 INVENTOR William 6. Fraser ATTORNEY Sept. 26, 1933- w. G. FRASER 1,928,052

REFINING ENGINE FOR USE IN PULP REFINING Filed March 5, 1931 2 Sheets-Sheet 2 S X s Q Q Q Q INVENTOR William G. Fraser ATTORNEY Patented Sept. 26, 1933 r r g b Application March 5, 1931, Serial No. 520,450,.

and in Great Britain February 1931' 7 Claims. (CI. 92-27) This invention relates to refining engines of the two rotors are formedor provided with blades I the conical type used in the manufacture of paper or bars. 19 which co-operate" in known manner and in allied industries and the object of the inwith similar bars 20 formed on the. interiors of vention is to provide an improved and simplified the outer shells. 1 I y 5 arrangement employing more than one conical The larger end of the rotor 2;is curved as shown refining element on a common operating shaft. at 21 in Fig. 1 soas to formaround it an'annular According to the present invention an improvepassage at the point of connection between the ment is provided wherein two co-operating conitwo outer shells. At this point the smallerend cal refining units are so disposed that the stuff of the shell 5-7 is outwardly flared to ,form a 10 passes directly from one unit to the other without flange 210. whose external diameter is equivalent the use of external comiections whilst means are to the external diameter of the shell 4'6 atits provided for adjusting the outer cones relatively larger end. To form a closedannular chamber 22 the one to the other or simultaneously for the at this point the two, shells are connected by a purposes of imparting extra pressure when recoupling 23 of'flexible material such :as india quired or for taking up wear. rubber which is fixed onto the shellswith' awire 7 0 Reference will now be made to the accompanywinding 24 andis initiallyicurvedas shown so as ing drawings which illustrate by way of example to permit one of the-shells to be adjusted rela constructions according to the invention andin tively to the other. 7 Theinlet to theurefiner is which: I 1 at 25, the stuff passing between the shell 4- -6 Fig. 1 is an elevation partly in section of one and rotor 2 to the annular chamber 22 from which 7.5 form of refining engine, M y it passes vbetween the shell 5-7 and rotor 3 to Fig-2 is an end elevation, I 4 w an outlet 26 which opens from an annularjcham-i Fig. 3 is a plan with the upper halves of the her-27 formed around the larger end of the outer shells removed, 4 a I rotor 3.. p Fig. 4 is a detail view of the adjusting mecha- Mounted "in bearings in the sole plate is a nism for one of the cones and I screw threadedspindle 28which is utilized for the Fig. 5 is an elevation partly in section showing purpose of effecting adjustments in the positions a modified arrangement. of the shells 4. 6 and 5-7. Adjustment is nor- In the construction illustrated in Figs. 1-4 two mally effected by means of a hand wheel 29 conical refining elements are disposed around mounted on-.;a shaft whose innerend carries a a common central shaft 1, these elements includworm engaging a worm wheel 30 fixedon the" ing rotors 2 and 3 fixed to the said shaft to rotate spindle 28 .The spindle is so mounted as'to .be therewith and relatively fixed outer casings or capable of rotary but not. longitudinal movement shells which intercommunicate and are formed so .that ;its rotations impart longitudinal movewith removable upper sections 4 and 5 and lower ment to a bracket 31, carrying a boss 32 which 0 sections 6 and '7. The lower halves 6 and '7 of: engages witha slot in the under side ofv the shell the two casings are formed with downwardly 46. The spindle 281s associated with a sece extending portions 8 which engage guide mem- 0nd bracket 33 also having a boss 34 which enbers 9 formed above a sole plate 10 and con gages with a slot at-the under side of the'shell I structed to permit longitudinal movement of the 57. By these means rotation of the hand wheel outer shells relatively to the shaft 1 as hereinafter 29 in either direction causes simultaneous lon- 1 described. I gitudinal movement in either direction of the two The shaft 1 is carried at its ends in watercooled outer shells 46 and 5 '-7. thrust bearings 11 and one end is connected In order that-itmaybe'possible to adjust the through a flexible coupling 12 with an electric shell 5g'l independently relatively to the shell motor 13 which is also bolted to the sole plate 1 4-6 in .cases where additional pressure. isreor to an extensionthereof. v quired at the; second stage they bracket "33 is The two rotors 2 and 3 are hollow as shown mounted overa sleeve 35 formed integralwith a in Fig. 1 and are both tapered in the same direcworm wheel 36 and internally screw threaded at 7 tion the larger end of the rotor 2 having an annu- '37 (as shown in Fig. 4) to engage the spindle 28. lar socket 14 into which a spigot 15 on the smaller The worm wheel 36 is engaged bya worm on the end of the rotor 3 engages. The two rotors are inner end of a spindle'38 provided with a handle held in this position of engagement by rods 16 39 movement of which causes the sleeve 35 to and nuts 17 disposed in recesses 18. formed in the travel in either direction along the spindle 28 outer ends of the two rotors. The exteriors of and consequently move the shell 5-'? without necessity for providing room to-xtractthe ce'n'-,

tral shaft 1 and rotors 2 and 3 endwise. I

For cleaning purposesthe annular chamber 22 is provided with outlets 41 normally closed by doors 42.

In'the form of construction illustratedin Fig.

5 two co-operating conical refining'elements are assembled in the same relative position as in the construction previously described. case, however, the outershell 42a ofone unit is formed at its end of greater diameter with an annular flange 43 which overlaps a fiange 44 of smaller diameter, formed on the smaller end of the outer shell 45 of the second refining unit. Within the flange 43 is formed an annular groove inwhichis seated aring46 of india rubber or other packing material arranged to bear upon the outer cylindrical surface of the flange 44,

i to make a fluid tight jointtherewith in all posi tions of adjustment of the two outer shells;

"Said outer shells 42a and 45 are provided with independent means of adjustment, that is to say, separate hand wheels 4'7 and 48 are provided to operate screw threaded spindles49 and50 to move brackets 51 mounted onsaid spindles and having projections 52 which engage with recesses on the under side of adj acent members .53, a number of which members 53 extend downwardly from the shells 42a and 45 and are slidable in guides 54 extending upwardly fr'om the *sole plate 55. i Y r Both forms of the machine above described are constructed so that they can be operated under much greater pressure of stuff supply than has hitherto been'possible as with the present constructions the stuff can be-pumped direct into the machine and the outlet controlled through a'valve or other means, this serving to raise the pressure inthe interior of the'refiner to a much greater extent than has hitherto been done. In addition to this the invention also pos V sesses the; advantage that the -'constructio'n is simplified by avoiding the use of'external-connections between the two conical refining units which'are now brought soclose together that'the stuff passes directly from the one to the other.

l. A machinefor refining paperpulp comprising two conical refining units comprising rotors and coacting shells, said rotors'and shells taperjingfinthe same direction, a shaft on which said rotors are'coaxially mounted, said shells being in communication for feeding the'ihaterialunder treatment directly from one unit to the other, 7 means for adjusting the said shells simultaneously, and means for adjusting the shell of one unit independently of the other-unit In this to the other shell.

2. A machine for refining paper pulp according to claim 1 having a connecting means between the shells permitting one shell to slide relatively to the other shell during adjustment. 1

3. A machine for refining paper pulp comprising two conical refining units comprising rotors and coacting shells, said rotors and shellsta'pering in the same direction, a shaft on which said rotors are coaxially mounted, said shells being in communication forfeeding the material under treatment directlyfrom one unit to theother, means for adjusting the said shells simultane ously, means for adjusting the shell of one unit independently of the other unit, said rotors and shells coacting to form an annular chamber connecting thedischarge end of one unit with the inlet: end of the other unit, and a flexible wall about said chamber permitting relative adjust-- ment of the shells.

4. A machine for refining paper pulp'comprising two conical refining units comprising rotors and coacting shells, said rotors and shells tapering in the same direction, a shaft on which said rotors are coaxi-ally mounted, said shells being in n communication for feedingthe material under treatment directly from one unit to the otherfa V screw shaft, means on the shell engaged by the shaft so that the shells maybe adjusted simul taneously, an'operating member and wormwheel for rotating said ,shaft,*and means associated 1W5 with said screw shaft for adjusting the'shellof one unit independently of the other unit. I 5. A machine for'refining paper pulp comprisling two conical refining units comprising rotors and coacting shells,-saidrotors and shells tapering in the same direction,-a shaft on which-said rotors are coaxially'mounte'd, said shells being in communication for feeding the'material under treatment directly from one unit to the other, a

screw-threaded shaft by which the shells-are adfigs justed simultaneously, an operating member and gearing for rotating said shaft, means engaging the shells and engaged by said shaft including a boss having a bracket threadedto the-shaft and T engaging one of the shells, "gearing on said bracket, and an auxiliary device for operating the last mentioned gearing to effect independent, adjustment of one shell relatively to theother shell.

6. A machine for refining paper 'pulpcomprising two conical refining units comprising rotors.

"and coacting shells, said rotors and shells tapering in the same direction, a shaft on which said rotors are coaxiallymounted, said shells-being in communication for feeding the material under of,

screw shaft, brackets, a sleeve on which one of said brackets is journaled, said sleeve and the treatment directly from one unit tothe other, a

'7. A machine or refining paper p l o al *ing to claim 6 having boss connections between the brackets, shells and gearing; e WILLIAM GROUNDWATER FRASER. 

